Other and unspecified chronic thyroiditis

This code represents a persistent inflammation of the thyroid gland that is not otherwise specified or falls into categories like Hashimoto's or Riedel's thyroiditis. It indicates a long-standing inflammatory process affecting thyroid function, potentially leading to hypothyroidism or goiter.

Use this code when documentation specifies "chronic thyroiditis" without further detail, or when other forms of chronic thyroiditis (e.g., Hashimoto's, Riedel's) have been ruled out. It is appropriate for cases where the specific etiology of the chronic inflammation is unknown or not clearly documented.

• Avoid using this code if a more specific type of chronic thyroiditis (e.g., Hashimoto's) is documented; use the specific code instead.
• Query the provider for clarification if "chronic thyroiditis" is noted without further specificity, to determine if a more precise diagnosis can be assigned.
• Code any associated hypothyroidism or other thyroid dysfunction separately, as this code only describes the inflammation.